Add preliminary Dockerfiles for Rocky Linux 9 and Debian 12

[SwooshyCueb]

We don't have externals in our repos for these distros yet, so those parts of the Dockerfiles are commented out.

Some other things worth noting:

• In Rocky Linux 9, the powertools repo is now the crb repo. Supposedly this is how it's always been on RHEL proper.
• The default GCC in Debian 12 is GCC 12.
• In order to install pip packages globally on Debian 12, the argument --break-system-packages must be passed to pip install
• xmlrunner is provided in the package repositories for Debian 12

[korydraughn]

Changes seem good.

Given all the files are new except one, we can wait until externals supports the new platforms before merging.

[SwooshyCueb]

we can wait until externals supports the new platforms before merging

Given that I currently have the externals stuff commented out, I'll switch the PR to draft status until we've got packages in the repos

[alanking]

The packages for Rocky Linux 9 and Debian 12 externals are now published to packages.irods.org, so I think we are ready to proceed here.

[SwooshyCueb]

I've updated the PR with the new externals repo option and to add the package repos

[korydraughn]

Everything looks normal.

Let's wait for one more approval before pounding.

[alanking]

I'm not too much of a stickler for keeping these clean but was curious about the commented-out CMake/PATH lines in the core builders.

[alanking]

Oh, consider linking to irods/irods#7191 and irods/irods#7266